[Distributed] Support Overlap p2p in pipeline_parallel #61935
Merged
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Description
Pcard-73145
流水线并行支持p2p通信和前反向计算overlap。
控制随机性之后的收敛曲线:
![image](https://private-user-images.githubusercontent.com/19485646/307272538-40b060e0-270c-474e-9438-af3527607d6a.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.FtgXOZOzhDNpuId1QooaWcQak68n9gGT4HATUShrZUg)